Non-heating valve hand-wheel.



D. R. YARNALL.

NON-HEATING VALVE HAND WHEEL.

APPLICATION FILED SEPT. 8, I916.

1,21 8,032. A Patented Mar; 6, 1917.

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attoznmg UNITED sTATEs P TENT oEETcE.

DAVID EoBEET YAENALL, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR To NELsONvALvE COMPANY, 0E CHESTNUT HILL, PHILADELPHIA, PENNSYLVANIA, A COR-POBATION OF PENNSYLVANIA.

NON-HEATING VALVE HAND-WHEEL.

To all whom it may concern:

Be it known that I, DAVID ROBERT YAR- NALL, a citizen of the UnitedStates, residing at 316 Preston street, Philadelphia, in the county ofPhiladelphia a and State of Pennsylvania, have invented a certain newand useful Non-Heating Valve Hand- Wheel, of which the following is aspecification.

My invention relates to hand-wheels for steam valves in which it isdesirable to attain a maximum of strength with thorough reliability andas much heat insulation as possible.

The purpose of my invention is to provide a pair of radially arrangedannular rims of different diameter spaced by a relatively thin centralperforated web.

A further purpose of my invention is to make the outer part of the wheelof girder section with the head or flange upon the inside smaller thanupon the outside.

A further purpose of my invention is to supply an annular heatdistributing ring, or annulus connected with the hub and to provide alarger grasping ring thereabo-ut, spaced therefrom by acircumferent'ielly interrupted web.

Further purposes will appear in the specification and particularly inthe claims thereof.

I have preferred to illustrate my invention by but one form thereof,selecting one which in practice has proved to be light, strong, a goodheat insulator and inexpensive in manufacture and which at the same timewell illustrates the principles of my invention.

In the drawings, similar numerals of reference indicate like parts.

Figure l is a top plan view of the preferred embodiment of my invention.

Figs. 2, 3 and 4 are sections of Fig. 1 upon lines 2-2, 3-3 and 4l,respectively.

The hub 1' contains the usual tapered stem hole 2 and supports thespokes 3. These spokes are shown as extending in radial planes, but atan angle with the radii within these planes, as best seen in Fig. 2,giving room for the valve stem nut below the level of the hand hold.

Instead of connecting the spokes directly with the outer rim, I connectthem with an inner rim or annulus &, of preferably ellipti-Specification of Letters Patent. I Patented 131 6 1917.

Application filed september s, 1916.

Serial No. 118,986.

cal cross section and with the major axis of the ellipse (its depth)parallel with the hub axis. I give the annulus l considerable body forthe purposes of providing strength and of distributing the heat andgiving off a large proportion of the heat conducted to it by the spokes3.

In order that the heat from the annulus 4 may affect the user of thevalve as little as possible, I surround it by an outer annulus or rim 5,whose depth (parallel with the axis of the hub) is greater than thedepth of the annulus 4 so that the relative projection of the faces ofthe outer annulus beyond the inner annulus will protect the hands of theuser from engaging the more highly heated inner annulus. The two annulior rims are connected by a. preferably radial web 6 perforated as at 7.The outer rim is also shown as of elliptical cross section and the tworims may be considered as forming heads or opposltelyextendmg flangesfor the web, glvmg a girder cross sectlon.

I show a large number of perforations in the web to reduce the heatconductivity between the annuli 4 and 5, while maintaining sufficientstrength between.

To improve the grasping qualities of the having two co-axial,radially-disposed'anside the annulus in radial line therewith havinggreater depth axially of the hub than the annulus and an apertured webconnecting the annulus and rim.

3. In a valve hand wheel, a valve wheel having two coaxial annuli ofdifferent depth, axially of the wheel, connected by an apertured web toform a beam section, that annulus which is of greater depth being of thelarger diameter and having its outer edge extending farther axially awayfrom the valve than the annulus of'lesser depth and diameter, incombination with a hub and spokes connecting the hub and inner annulus.

DAVID ROBERT YARNALL.

Copies ofthis patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

